package adv1;

public class SystemTest {

	public static void main(String[] args) {
		//
		try {
			long l = System.currentTimeMillis();
			System.out.println("1970年到现在的毫秒数：" + l);
			long start = System.nanoTime();
			int m = 304 * 104;
			System.out.println(m);
			long end = System.nanoTime();
			System.out.println("乘法耗时：" + (end - start) + "毫微秒");
			int f = 4 / 0;
		} catch (Exception e) {
			e.printStackTrace();
			System.exit(0);
		} finally {
			System.out.println("over");
		}
	}
}
